![]() A battery's impedance can increase if a battery has a higher chemical age. A battery with a high impedance may be unable to provide sufficient power to the system that needs it. One attribute that affects this instantaneous power delivery is the battery’s impedance. In order for a phone to function properly, the electronics must be able to draw upon instantaneous power from the battery. In addition, a battery’s ability to deliver maximum instantaneous performance, or “peak power,” may decrease. This can be referred to as the battery’s maximum capacity - the measure of battery capacity relative to when it was new. Note: For information about extending your battery performance, see the Optimize Battery life tutorial.All rechargeable batteries are consumable components that become less effective as they chemically age.Īs lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged. Battery usage information will be displayed. Let it charge until it turns on, or until it's fully charged.įrom the home screen, select the Settings app then scroll to and select Battery. Note: If your device has turned off, you might see a black screen for a few minutes even after you plug it in. After that, you can use your device while it continues to charge. Plug in your device and let it charge for at least 10 minutes before using it. If you see this screen, it means your battery is really low. To manually turn Low Power mode on or off, from the home screen select the Settings app > scroll to and select Battery > select the Low Power Mode switch. Low Power Mode temporarily reduces background activity until you can fully charge your iPhone. Note: If prompted, select Continue to enable Low Power Mode. When your device reaches 20 percent battery, you're automatically prompted to enable Low Power Mode. If the Battery icon is yellow, Low Power Mode is on. If your device is connected to a computer that’s turned off, is in sleep or standby mode, your device's battery may drain. Note: Make sure your computer is plugged in and powered on when you’re using it to charge your device. Insert the USB end of the Lightning-to-USB cable into an open USB port on the computer. Insert the Lightning end of the Lightning-to-USB cable into the port at the base of the device. ![]() ![]() ![]() Use the original charger and battery to maintain optimal battery performance over the life of your device. Battery life and charge cycles vary by use and settings. ![]() Note: You can use the device while charging. Insert the Lightning end of the Lightning-to-USB cable into the port at the base of the device then then plug into the power adapter. Swipe down from the upper right corner of the screen to access the Control Center. Note: You can view the battery percentage in the Control Center. This shows how much battery life is left. When your iPhone is on, you’ll see the Battery indicator in the right corner of the Status bar. Note: Learn what to do if your device doesn’t charge when you plug it in. When the device is charged to 100% the battery indicator in the Status bar will appear solid green. When your device is charging, the Charging icon will appear on the iPhone battery indicator in the Control Center. IPhone X Series: Want a demonstration about charging your device? View a video about charging, power modes, and battery usage information. ![]()
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